Scraper



April ,1926. f 1,519,475 E. J. DOBERSTEIN scRAPER Filed March 17 1925 MJM M Mze u @2M jak Patented Apr. e, 1926.

UmTEDsTATEs PATENT; oiFicE. f

EDWARD .L DOBERSTEIN, or isLUa ISLAND, ILLINOISASSIGNOR To eroonivrAN .MANU- FAcTURINGooMrANm-OF orIIoAeo, ILLINOIS, A CORPORATION oF ILLINOIS.

SCRAPER.

Apliiicatiqn med March 17, 192s. `Vserial No. 625,792.-

To all whom t may concern.:

Be it known that I, EDWARD J. 'Donna- STEIN, a citizen of theV Unitedk States, re-

The object of my invention is to4 provide the class described. s p

My invention may best be understood by reference to the laccompanying drawings an improved construction of a scraper of Y which illustrate one form of embodiment ot myl invention, in which?4 Figure 1 is a plan view of a "scraperyconstructed in accordance with *my invention. .y Figure 2 is a sectional view vtaken on line 22 of Figure 1. f` -Figure 3 isa rear viewof the scraper with parts broken away and drawn -toa somewhat larger scale than Figures 1 and 2.

The apparatus comprisesA a scraper body 10 which may be of `any desired construction and arrangement as for instance, it may comprise a pairof side walls 11, 11, connected by suitable cross members 12, 13, and 14. A pair of inwardly extending ianges 15, 15' are connected to the Vlower margins ofthe side walls, the central poi'- tion of the scraper being ibottomless, as shown, although it may be desirable under some 'circumstances to bottom.

The scraper when in use is adapted to be moved reciprocably along the ground by suitable power devices, such as a hoisting engine (not shown), having connection with the scraper through a head line 2O and a tail line 21. These lines may be arranged and guided by fixed or movable sheaves or devices in any desired manner to direct the scraperV reciprocably between the point of gathering and the point to which the material is to be transported and deposited.k

Referring now more particularly Yto the provide a continuousV Y details of construction Vembodying my inifentio'n, vI provide-a movable wall at-one end of thel scraper adjacent the tail V'line 21, comprising a wall portion 25 adapted normally` to extend across the .rear end of the scraperfto form a' closure therefor, and

having a p'air of 4connected sidepieces, such as plates 27, 27 pivotally connected to the two side wallsp'll, 11, on a horizontal transverse axis, as indicated vat 26, 26.

inside its adjacent `side wall 11, and is journaled onf a bearing stud 28 mounted on said side wall. The movable end member 255i's preferablyl formed yarcuate'in cro-ss section, as clearly shown in Figure 2, having 'as its 'centre the transverse axis about which I 30, 30, and'horizontally kdisposed rollers 31,

31, and connected to the lplates 27,27. This connection may be made iii-"any suitable manner as' yfor instance, 'a looped end 2O'J of each `filexible s terminal" lis passed about a stud 33 mounted 'on a pin supported between the plate 27 and a bracket 37 conv In thev form shown thesevplates are' each arrangedA eoV nected to the inner iace of said plate. The

pin V3-1 also extends through a slot 36 formed inthe side wall 11, this slot being arcuate in shape to permit the end member 25 to swing pivotally, the opposite ends of said' slot forming stops to limit the forward and rearward movementsv of said end member. Connection with the tail rope `is provided by means of a pair ofl flexible terminals 21a, 21Ll connected by suitable means to studs 39, 39 on the outer ends-oi' the pins 311, 34. It

will be noted in Figure 2'thatfthe movement of the end member 25 is limited vby the pins 34, 34 in slots 36, 36 so that the connections between said member 25V and the draft ropes are always below the pivotal point 26 ofv said moving member. This arrangement provides effective leverage for operation of the end member 25 in eithery direction orP ymovement of the scraper.

It will 'now bev clear that my improved scraper above described gathers its load at s the toe of the pile of loose material while being moved rearwardly by the. tail rope,.

the draft on the tail -rope serving to swing theend member 25 upwardly into the position shown in dotted lines in Figure 2, so that the rear margins of side walls l1, ll of the scraper cut into the material unimpeded' by said end member. /Jhen the scraper has been advanced sufficiently to gather its load, the pull on the tail rope 2l is discontinued and tension is applied to the head rope 10. rlhis tension is applied directly on the end member 25 in a direction to swing the same downwardly and is furthermore indirectly applied to the scraper so as to move the latter forwardly. rihe lower port-ionyof the end member Q5, being curved forwardly, will readily cut into the loose material until the end member resumes its fully closed position as shown in full lines in Figure 2. rl"h`e end member is preferably arcuate in sec-tion with its pivotal axis as the center thereof, as described, so as to offer a minimum resistance tothe material during the closing thereof.

Among the advantages of my scraper are its simplicity of construction and positiveness in operation. The operating parts are few and simple in construction, and are mounted on the side walls leaving the central part of the scraper body free and unobstructed for loading and unloading. Furthermore, the rear end member wil-l be maintainedv in closed position when the draft rope is pulled at various angles with respect to the longitudinal axis of the scraper, as for instance, when it is desired to turn the scraper at an angle from its normal course or forward movement.

Althouglil have shown and described one form in which my invention may be embodied, it will be understood that the details of construction may vary widely for attaining objects and advantages similar to those herein disclosed without departing from the spirit and scope of my invention. l do not therefore', wish to be understood as limiting myself to the specific' construction illustrated herein, excepting as specifically limited in the appended claims.

I claim as vmy invention:

l. A scraper adapted for reciprocable movement along. the ground and open at the forward end thereof, said scraper having side walls forming upright cutting edges at the rear end thereof, a movable closure pivotally connected to be bodily swung verti- 'ally above the cutting edges at said rear end, and draft means for reciprocably moving said scraper havingoperable connection with said closure whereby said scraper may be filled through the rear end when moved rearwardly, said closure means being movable into position to close therear end when the sera-per is moved forwardly.

2. A scraper adapted for reciprocable movement along the ground and open at the forward end thereof, said scraper having side walls'forming upright cutting edges at the rear end thereof, a rearl end portion normally forming a closure therefor and curved forwardly adjacent its lower edge, said rear end portion being pivotally connected to said side walls and arrangedrto be bodily swung upwardly and above saidY cutting edges, and draft means for reciprocably moving said scraper having operable connection with said rear end portion.

Signed at Chicago, in the county of Cook and State of Illinois, this 28th day of F ebruary, 1923.

EDWARD J. DoBEnsTEIN. 

